63668646 divided by 858 
We're looking to find how many times 858 goes into 63668646.

Step 1:
If we divide 6 by 858, we get 0 and a remainder of 6.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 6 leaves us with 6.
Grab the next digit (3) from the dividend, add it to 6, then carry on: 63 / 858

On to step 2:
858 goes into 63 0 times with a remainder of 63.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 63 and we're left with 63.
Grab the next digit (6) from the dividend, add it to 63, then carry on: 636 / 858

Going ahead to step 3:
858 can be fit into 636 0 times, resulting in a remainder of 636.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 636, we end up with 636.
Append the next digit (6) from the dividend to 636 and continue with: 6366 / 858

Moving on to step 4:
858 can be fit into 6366 7 times, resulting in a remainder of 360.
Write down 7 as next digit of the result. 
Result so far: 7.0
If we subtract 6006 from 6366, we get 360.
Take the next digit (8) from the dividend and append it to 360, then repeat: 3608 / 858

On to step 5:
858 goes into 3608 4 times with a remainder of 176.
The number 4 becomes the next digit in our result. 
Result so far: 74.0
Subtracting 3432 from 3608 leaves us with 176.
Fetch the next digit (6) from the dividend, attach it to 176 and continue: 1766 / 858

Moving on to step 6:
858 can be fit into 1766 2 times, resulting in a remainder of 50.
The next digit of our result is 2. 
Result so far: 742.0
If we take 1716 away from 1766, we end up with 50.
Take the next digit (4) from the dividend and append it to 50, then repeat: 504 / 858

Going ahead to step 7:
858 goes into 504 0 times with a remainder of 504.
Record the quotient 0 as the next digit in the result. 
Result so far: 7420.0
Subtracting 0 from 504 leaves us with 504.
Take the next digit (6) from the dividend and append it to 504, then repeat: 5046 / 858

Advancing to step 8:
858 can be fit into 5046 5 times, resulting in a remainder of 756.
Put 5 as the next digit of the answer. 
Result so far: 74205.0
Deduct 4290 from 5046 and we're left with 756.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7560, and continue the process.

Going ahead to step 9:
7560 divided by 858 is 8 with a remainder of 696.
Write down 8 as next digit of the result. 
Result so far: 74205.8
Deduct 6864 from 7560 and we're left with 696.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6960, and continue the process.

Advancing to step 10:
6960 divided by 858 is 8 with a remainder of 96.
Use 8 as the next digit of our solution. 
Result so far: 74205.88
Subtracting 6864 from 6960 leaves us with 96.
Since there are no more digits in the dividend, we add a zero to the remainder making it 960, and continue the process.

The final outcome is 74205.88, with a leftover of 0.096.